Using The DDA Line Drawing Algorithm: Write C Code To Draw

using The Dda Line Drawing Algorithm Write A C Code To Draw The Fo

1. Using The DDA Line Drawing Algorithm Write A C Code To Draw The Fo

1. Using The DDA line drawing algorithm write a c++ code to draw the following on the screen. (5mks) ( 10,10 ) X X X X X X ( 20,10 ) X X X X X X X X X X ( 10,20 ) X X X X X X ( 20,20 )

Paper For Above instruction

Implementing the Digital Differential Analyzer (DDA) line drawing algorithm in C++ provides an efficient way to render lines on a raster display by interpolating points between two given coordinates. The DDA algorithm works by calculating intermediate points along a line between specified start and end coordinates, ensuring smooth and accurate rendering. In this context, we aim to draw specific points forming a pattern on the screen, based on the provided coordinates, using the DDA line drawing method.

The target pattern involves plotting marks at specific coordinates to form a particular shape or arrangement, which likely resembles a rectangle or grid structure. These points are specified at (10, 10), (20, 10), (10, 20), and (20, 20). To achieve this, we will create a C++ program utilizing a graphics library such as graphics.h in conjunction with the DDA algorithm to draw lines connecting these points, resulting in the desired visual pattern.

Our implementation will include functions for the DDA line drawing mechanism, setting up the graphical window, and plotting the specified points. The primary goal is to demonstrate the use of the DDA algorithm to create lines between key points, ultimately visualizing the pattern described in the assignment. Below is the detailed C++ code implementing these objectives.

Sample C++ Code Implementing DDA Line Drawing for the Pattern

include 


include 


include 


include 


// Function to perform DDA line drawing between two points


void drawLineDDA(int xStart, int yStart, int xEnd, int yEnd) {


int dx = xEnd - xStart;


int dy = yEnd - yStart;


int steps = std::max(abs(dx), abs(dy));


float xIncrement = dx / static_cast(steps);


float yIncrement = dy / static_cast(steps);


float x = xStart;


float y = yStart;


for (int i = 0; i 

putpixel(round(x), round(y), WHITE);  // Plot pixel at (x,y)


x += xIncrement;


y += yIncrement;


}


}


int main() {


// Initialize graphics window


int gd = DETECT, gm;


initgraph(&gd, &gm, "C:\\Turboc3\\BGI");


// Define coordinates based on given points


int x1 = 10, y1 = 10;   // Point A


int x2 = 20, y2 = 10;   // Point B


int x3 = 10, y3 = 20;   // Point C


int x4 = 20, y4 = 20;   // Point D


// Draw lines connecting the points to form the pattern


drawLineDDA(x1, y1, x2, y2); // Line AB


drawLineDDA(x1, y1, x3, y3); // Line AC


drawLineDDA(x2, y2, x4, y4); // Line BD


drawLineDDA(x3, y3, x4, y4); // Line CD


// Keep the window open until a key is pressed


getch();


closegraph();


return 0;


}

This program initializes a graphics window, uses the DDA line drawing function to connect the specified points, and thereby visualizes the pattern as described. The use of putpixel ensures a pixel-perfect rendering suitable for learning and demonstration purposes. The pattern formed by these lines can be adapted to any size or shape by modifying the coordinate points accordingly.

References

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  • Sharma, S. (2009). Digital Differential Analyzer Algorithm in Computer Graphics. International Journal of Computer Applications.
  • Gonzalez, R. C., & Woods, R. E. (2008). Digital Image Processing. Pearson.
  • OpenGL Programming Guide. (2002). The Official Guide to Learning OpenGL, Version 1.4. Addison-Wesley.
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  • Subramanian, S. (2012). An Efficient Implementation of DDA Algorithm. International Journal of Computer Science and Mobile Computing.

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